An optical imaging lens

Abstract

The present invention discloses an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens having a focal power; a second lens having a focal power; a third lens having a focal power, whose image side is concave; a fourth lens having a focal power; and a fifth lens having a focal power, whose image side is convex; wherein, the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region of the electronic photosensitive element satisfy: TTL / ImgH < 1.3; the effective focal length f5 of the fifth lens, the curvature radius R9 of the object side of the fifth lens, and the curvature radius R10 of the image side of the fifth lens satisfy: 0 < f5 / (R9 + R10) < 0.8; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: 0 < R1 / R2 < 0.7. The optical imaging lens provided by the present invention realizes miniaturization of the camera lens and ensures a small opening size of the front screen of the lens while ensuring excellent imaging quality.

Description

Technical Field

[0001] The invention belongs to the field of optical imaging, and in particular relates to an optical imaging lens comprising five lenses. Background Art

[0002] In modern life, smart electronic devices such as mobile phones, computers and tablets have become an indispensable part of people's lives. For consumers, camera performance is an important indicator of mobile phone performance and is receiving more and more attention. In addition to excellent imaging quality, high resolution, large depth of field and large aperture, electronic devices have an increasingly urgent need for miniaturization of camera lenses. Designing a high-pixel, thin and light mobile phone lens has important practical significance.

[0003] Therefore, a five-piece camera lens assembly is needed to miniaturize the camera lens and ensure a smaller screen opening size at the front end of the lens while ensuring excellent imaging quality. Summary of the invention

[0004] The present invention aims to provide an optical imaging lens composed of five lenses, which can miniaturize the camera lens and ensure a smaller screen opening size at the front end of the lens while ensuring excellent imaging quality.

[0005] One aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having optical power; a second lens having optical power; a third lens having optical power, whose image side surface is concave; a fourth lens having optical power; and a fifth lens having optical power, whose image side surface is convex; air spaces are provided between adjacent lenses; and a glass aspherical surface is included.

[0006] The axial distance TTL from the object side of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area of ​​the electronic photosensitive element ImgH satisfy: TTL / ImgH<1.3.

[0007] According to one embodiment of the present invention, the effective focal length f5 of the fifth lens, the curvature radius R9 of the object side surface of the fifth lens, and the curvature radius R10 of the image side surface of the fifth lens satisfy: <f5 / (R9+R10)<0.8。

[0008] According to one embodiment of the present invention, the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: <R1 / R2<0.7。

[0009] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens and the curvature radius R6 of the image side surface of the third lens satisfy: 0.3 <f / R6<1.3。

[0010] According to one embodiment of the present invention, a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.57≤CT5 / CT4<1.

[0011] According to one embodiment of the present invention, the axial distance T12 from the first lens to the second lens and the axial distance T34 from the third lens to the fourth lens satisfy: <T12 / T34≤0.71。

[0012] According to one embodiment of the present invention, the axial distance T23 from the second lens to the third lens, the axial distance T45 from the fourth lens to the fifth lens, and the center thickness CT1 of the first lens on the optical axis satisfy: 1≤(T23+T45) / CT1<1.5.

[0013] According to one embodiment of the present invention, the effective half-aperture DT21 of the object-side surface of the second lens and the effective half-aperture DT12 of the image-side surface of the first lens satisfy: DT21 / DT12≥1.01.

[0014] According to one embodiment of the present invention, the effective half-aperture DT22 of the image side of the second lens and the effective half-aperture DT31 of the object side of the third lens satisfy: 0.6 <DT22 / DT31<1。

[0015] According to one embodiment of the present invention, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f4 of the fourth lens satisfy: 1 <f / f1+f / f4<2。

[0016] According to one embodiment of the present invention, the sum ∑AT of the air intervals on the optical axis between any two adjacent lenses with optical focal length from the first lens to the lens closest to the imaging surface and the maximum field of view FOV of the optical imaging lens satisfy: 1.04mm≤∑AT / tan(FOV / 2)<2mm.

[0017] According to one embodiment of the present invention, the on-axis distance SAG21 between the intersection of the second lens object side surface and the optical axis to the effective radius vertex of the second lens object side surface and the effective semi-aperture DT32 of the third lens image side surface satisfy: <SAG21 / DT32<0.6。

[0018] According to one embodiment of the present invention, the on-axis distance SAG41 between the intersection of the fourth lens object side surface and the optical axis to the effective radius vertex of the fourth lens object side surface and the on-axis distance SAG42 between the intersection of the fourth lens image side surface and the optical axis to the effective radius vertex of the fourth lens image side surface satisfies: <SAG41 / SAG42<0.6。

[0019] Another aspect of the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having optical power; a second lens having optical power; a third lens having optical power, whose image side surface is concave; a fourth lens having optical power; and a fifth lens having optical power, whose image side surface is convex; air spaces are provided between adjacent lenses; and a glass aspherical surface is included.

[0020] The lenses are independent of each other, and there is an air gap between the lenses on the optical axis; the effective focal length f5 of the fifth lens, the curvature radius R9 of the object side of the fifth lens, and the curvature radius R10 of the image side of the fifth lens satisfy: <f5 / (R9+R10)<0.8。

[0021] Beneficial effects of the present invention:

[0022] The optical imaging lens provided by the present invention comprises a plurality of lenses, such as the first lens to the fifth lens. The optical imaging lens of the present invention enables the camera lens to be miniaturized and ensures a smaller opening size of the screen at the front end of the lens while ensuring excellent imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of a lens assembly of an optical imaging lens embodiment 1 of the present invention;

[0025] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0026] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention;

[0027] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 2 of the optical imaging lens of the present invention;

[0028] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention;

[0029] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0030] Figure 7 Schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present invention;

[0031] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 4 of the optical imaging lens of the present invention;

[0032] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical camera lens of the present invention;

[0033] Figures 10a to 10d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 5 of the present invention;

[0034] Fig.11 Schematic diagram of the structure of a lens group of an optical camera lens embodiment 6 of the present invention;

[0035] Figures 12a to 12d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 6 of the present invention;

[0036] Fig.13 Schematic diagram of the structure of a lens group of an optical camera lens embodiment 7 of the present invention;

[0037] Figures 14a to 14d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical camera lens embodiment 7 of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0041] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0042] In the description of the present invention, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0043] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal way unless explicitly defined in this article.

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] Exemplary Embodiments

[0046] The optical imaging lens of an exemplary embodiment of the present invention includes five lenses, which include: a first lens, a second lens, a third lens, a fourth lens and a fifth lens in order from the object side to the image side along the optical axis, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0047] In the present exemplary embodiment, the first lens may have a positive or negative optical power; the second lens may have a positive or negative optical power; the third lens may have a positive or negative optical power, and its image side is concave; the fourth lens may have a positive or negative optical power; the fifth lens may have a positive or negative optical power, and its image side is convex; it includes a glass aspheric surface.

[0048] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region of the electronic photosensing element is: TTL / ImgH < 1.3. By controlling the ratio of the total lens length to the image surface height, the total size of the camera lens group can be effectively reduced, and the ultra-thin characteristic and miniaturization of the camera lens group can be achieved, so that the camera lens group can better be applicable to more and more ultra-thin electronic products on the market. More specifically, TTL and ImgH satisfy: 1.1 < TTL / ImgH < 1.25. For example, 1.15 ≤ TTL / ImgH ≤ 1.20.

[0049] In the present exemplary embodiment, the conditional expression satisfied by the effective focal length f5 of the fifth lens, the curvature radius R9 of the object side of the fifth lens, and the curvature radius R10 of the image side of the fifth lens is: 0 < f5 / (R9 + R10) < 0.8. By controlling the ratio of the curvature radii of the image side and the object side of the fifth lens and the effective focal length within a reasonable range, the assembly process of the lens can be ensured, and a high aberration correction ability can be achieved. More specifically, f5, R9, and R10 satisfy: 0.3 < f5 / (R9 + R10) < 0.6. For example, 0.34 ≤ f5 / (R9 + R10) ≤ 0.53.

[0050] In the present exemplary embodiment, the conditional expression satisfied by the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens is: 0 < R1 / R2 < 0.7. Reasonably restricting the ratio of the curvature radii of the image side and the object side of the first lens can control the deflection angle of the light after passing through the first lens, thereby effectively reducing the sensitivity of the optical system, ensuring good processing performance, and keeping the field curvature contribution within a reasonable range. More specifically, R1 and R2 satisfy: 0.3 < R1 / R2 < 0.5. For example, 0.36 ≤ R1 / R2 ≤ 0.40.

[0051] In the present exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens and the radius of curvature R6 of the image side surface of the third lens is: 0.3 < f / R6 < 1.3. Reasonably controlling the ratio of the radius of curvature of the image side surface of the third lens to the total effective focal length is beneficial to reducing the sensitivity of the central field of view, enabling the camera lens group to have a high aberration correction ability while maintaining miniaturization, and being able to obtain better processability. More specifically, f and R6 satisfy: 0.6 < f / R6 < 1.2, for example, 0.62 ≤ f / R6 ≤ 1.00.

[0052] In the present exemplary embodiment, the conditional expression satisfied by the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis is: 0.57 ≤ CT5 / CT4 < 1. By reasonably restricting the ratio of the central thickness of the fourth lens on the optical axis to the central thickness of the fifth lens on the optical axis, it is not only beneficial to ensure the assembly process of the lens, achieve the miniaturization of the optical lens, but also reduce the processing sensitivity of the optical system. More specifically, CT5 and CT4 satisfy: 0.57 ≤ CT5 / CT4 < 0.7, for example, 0.57 ≤ CT5 / CT4 ≤ 0.66.

[0053] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance T12 from the first lens to the second lens and the on-axis distance T34 from the third lens to the fourth lens is: 0 < T12 / T34 ≤ 0.71. By reasonably controlling the on-axis distance from the first lens to the second lens and the on-axis distance from the third lens to the fourth lens, the deflection angle of light can be reduced, thereby reducing the sensitivity of the optical system. More specifically, T12 and T34 satisfy: 0.5 < T12 / T34 ≤ 0.71, for example, 0.52 ≤ T12 / T34 ≤ 0.71.

[0054] In the present exemplary embodiment, the conditional expression satisfied by the on-axis distance T23 from the second lens to the third lens, the on-axis distance T45 from the fourth lens to the fifth lens, and the central thickness CT1 of the first lens on the optical axis is: 1 ≤ (T23 + T45) / CT1 < 1.5. Reasonably adjusting the air gap between the second lens and the third lens and the air gap between the fourth lens and the fifth lens can effectively reduce the risk of ghost images between the lenses and contribute to the size compression of the camera lens group. More specifically, T23, T45, and CT1 satisfy: 1 ≤ (T23 + T45) / CT1 < 1.3, for example, 1.00 ≤ (T23 + T45) / CT1 ≤ 1.21.

[0055] In this exemplary embodiment, the conditional expression satisfied by the effective semi-aperture DT21 of the object side surface of the second lens and the effective semi-aperture DT12 of the image side surface of the first lens is: DT21 / DT12 ≥ 1.01. Reasonably controlling the effective semi-apertures of the first lens and the second lens is beneficial in reducing the size of the front end of the lens, making the entire camera lens group thinner and lighter on the one hand; on the other hand, reasonably restricting the range of incident light, eliminating light rays with poor quality at the edges, reducing off-axis aberrations, and effectively improving the resolution of the camera lens group. More specifically, DT21 and DT12 satisfy: 1.01 ≤ DT21 / DT12 < 1.1, for example, 1.01 ≤ DT21 / DT12 ≤ 1.03.

[0056] In this exemplary embodiment, the conditional expression satisfied by the effective semi-aperture DT22 of the image side surface of the second lens and the effective semi-aperture DT31 of the object side surface of the third lens is: 0.6 < DT22 / DT31 < 1. Reasonably controlling the effective semi-apertures of the second lens and the third lens can effectively reduce the total size of the camera lens group while ensuring the imaging quality and high resolution of the lens, and at the same time reduce the size of the front-end screen opening of the lens, making the entire camera lens group thinner and lighter. More specifically, DT22 and DT31 satisfy: 0.8 < DT22 / DT31 < 0.9, for example, 0.83 ≤ DT22 / DT31 ≤ 0.87.

[0057] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f4 of the fourth lens is: 1 < f / f1 + f / f4 < 2. Reasonably distributing the optical power of the first lens can slow down the deflection angle of light rays in the first lens and reduce sensitivity. At the same time, it avoids too large a surface tilt angle, thus ensuring good processability of the first lens. More specifically, f, f1, and f4 satisfy: 1.6 < f / f1 + f / f4 < 1.9, for example, 1.63 ≤ f / f1 + f / f4 ≤ 1.82.

[0058] In this exemplary embodiment, the conditional expression satisfied by the sum ∑AT of the air gaps on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface and the maximum field of view FOV of the optical imaging lens is: 1.04 mm ≤ ∑AT / tan(FOV / 2) < 2 mm. Reasonably distributing the air gaps of the camera lens group can ensure processing and assembly characteristics, and avoid problems such as interference between the front and rear lenses during the assembly process due to too small a gap. At the same time, it is beneficial to slow down the deflection of light rays, adjust the field curvature of the camera lens group, reduce the sensitivity, and thus obtain better imaging quality. More specifically, ∑AT and FOV satisfy: 1.04 mm ≤ ∑AT / tan(FOV / 2) < 1.2 mm, for example, 1.04 mm ≤ ∑AT / tan(FOV / 2) ≤ 1.18 mm.

[0059] In the present exemplary embodiment, the conditional formula satisfied by the axial distance SAG21 between the intersection point of the object side surface of the second lens and the optical axis and the vertex of the effective radius of the object side surface of the second lens and the effective semi-aperture DT32 of the image side surface of the third lens is: 0 < SAG21 / DT32 < 0.6. By reasonably controlling the ratio of the sagitta of the object side surface of the second lens to the central thickness of the third lens, it is beneficial to ensure the processing, shaping, and assembly of the imaging lens, so as to obtain good imaging quality. An unreasonable ratio may lead to difficulties in debugging the formed surface shape, obvious deformation after assembly, and thus the imaging quality cannot be ensured. More specifically, SAG21 and DT32 satisfy: 0.2 < SAG21 / DT32 < 0.55. For example, 0.22 ≤ SAG21 / DT32 ≤ 0.54.

[0060] In the present exemplary embodiment, the conditional formula satisfied by the axial distance SAG41 between the intersection point of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens and the axial distance SAG42 between the intersection point of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens is: 0 < SAG41 / SAG42 < 0.6. By reasonably controlling the ratio of the sagitta of the object side surface of the fourth lens to the sagitta of the image side surface of the fourth lens, it is possible to relatively easily balance the field curvature, axial spherical aberration, and chromatic spherical aberration of the imaging lens group, and then enable it to obtain good imaging quality and low system sensitivity, thereby better ensuring the processability of the optical imaging lens group. More specifically, SAG41 and SAG42 satisfy: 0.3 < SAG41 / SAG42 < 0.5. For example, 0.38 ≤ SAG41 / SAG42 ≤ 0.47.

[0061] In the present exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be set at an appropriate position as needed. For example, the diaphragm can be set between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0062] The optical imaging lens according to the above embodiment of the present invention may employ multiple lenses, such as the above five lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the optical imaging lens has a large imaging image plane, has the characteristics of a wide imaging range and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0063] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the fifth lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspherical mirror surfaces.

[0064] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0065] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0067] Figure 1 Schematic diagram of the lens group structure of the optical imaging lens embodiment 1 of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0068] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0069] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0070]

[0071]

[0072] Table 1

[0073] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=3.03 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.45 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=2.90 mm, and half of the maximum field of view of the optical imaging lens is Semi-FOV=42.99°.

[0074]

[0075] Table 2

[0076] The optical imaging lens in Example 1 satisfies:

[0077] TTL / ImgH=1.19, where TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area of ​​the electronic photosensitive element;

[0078] f5 / (R9+R10)=0.53, where f5 is the effective focal length of the fifth lens element, R9 is the radius of curvature of the object side surface of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element;

[0079] R1 / R2=0.38, where R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens;

[0080] f / R6=1.00, where f is the effective focal length of the optical imaging lens, and R6 is the radius of curvature of the image side of the third lens;

[0081] CT5 / CT4=0.65, where CT5 is the center thickness of the fifth lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis;

[0082] T12 / T34=0.67, where T12 is the axial distance from the first lens to the second lens, and T34 is the axial distance from the third lens to the fourth lens;

[0083] (T23+T45) / CT1=1.11, where T23 is the on-axis distance from the second lens to the third lens, T45 is the on-axis distance from the fourth lens to the fifth lens, and CT1 is the center thickness of the first lens on the optical axis;

[0084] DT21 / DT12=1.01, where DT21 is the effective semi-aperture of the object side of the second lens, and DT12 is the effective semi-aperture of the image side of the first lens;

[0085] DT22 / DT31=0.83, where DT22 is the effective semi-aperture of the image side of the second lens, and DT31 is the effective semi-aperture of the object side of the third lens;

[0086] f / f1+f / f4=1.82, where f is the effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, and f4 is the effective focal length of the fourth lens;

[0087] ∑AT / tan(FOV / 2)=1.06mm, where ∑AT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and FOV is the maximum field of view of the optical imaging lens;

[0088] SAG21 / DT32=0.28, where SAG21 is the axial distance between the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens, and DT32 is the effective semi-aperture of the image side surface of the third lens;

[0089] SAG41 / SAG42=0.45, wherein SAG41 is the on-axis distance between the intersection of the object side of the fourth lens and the optical axis to the vertex of the effective radius of the object side of the fourth lens, and SAG42 is the on-axis distance between the intersection of the image side of the fourth lens and the optical axis to the vertex of the effective radius of the image side of the fourth lens.

[0090] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0091]

[0092] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0093] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 3 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 1. 4 , A 6 , A 8 , A 10 , A12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0094]

[0095]

[0096] Table 3

[0097] Figure 2a The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 1 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 2c The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2d The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0099] Figure 3 Schematic diagram of the lens group structure of embodiment 2 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0100] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0101] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0102] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2169 S1 Aspheric 0.9439 0.4619 2.79 1.50 81.5 -0.0533 S2 Aspheric 2.4728 0.2058 11.3567 S3 Aspheric -8.5778 0.2100 -44.03 1.68 19.24 -9.4787 S4 Aspheric -12.1581 0.2188 49.6693 S5 Aspheric 6.1827 0.2401 -11.14 1.67 20.37 -13.6562 S6 Aspheric 3.3225 0.2979 4.7640 S7 Aspheric 30.4488 0.5255 1.67 1.55 56.11 1.3606 S8 Aspheric -0.9366 0.2857 -0.8591 S9 Aspheric -0.5668 0.3484 -1.38 1.54 55.65 -1.0000 S10 Aspheric -2.9002 0.2706 -0.5214 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1753 S13 Spherical endless endless

[0103] Table 4

[0104] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens f=3.03 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis=3.45 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 ImgH=3.01 mm, and half of the maximum field angle of the optical imaging lens Semi-FOV=44.24°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0105]

[0106] Table 5

[0107] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 6 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 2. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0108]

[0109]

[0110] Table 6

[0111] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 4c The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4dThe magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0113] Figure 5 Schematic diagram of the lens group structure of embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0114] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0115] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0116] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2141 S1 Aspheric 0.9322 0.4423 2.83 1.50 81.5 -0.0089 S2 Aspheric 2.3340 0.1951 11.1024 S3 Aspheric -5.6299 0.2173 60.00 1.68 19.24 44.8862 S4 Aspheric -5.0221 0.2442 43.4267 S5 Aspheric 8.0258 0.2400 -7.98 1.67 20.37 11.5448 S6 Aspheric 3.1614 0.2761 5.3877 S7 Aspheric 19.6994 0.5908 1.67 1.55 56.11 98.0000 S8 Aspheric -0.9443 0.2906 -0.8499 S9 Aspheric -0.5707 0.3380 -1.38 1.54 55.65 -0.9993 S10 Aspheric -2.9982 0.2508 -0.6630 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1548 S13 Spherical endless endless

[0117] Table 7

[0118] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens f=2.97 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis=3.45 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 ImgH=2.90 mm, and half of the maximum field angle of the optical imaging lens Semi-FOV=43.59°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0119]

[0120] Table 8

[0121] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 9 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 3.4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0122]

[0123]

[0124] Table 9

[0125] Figure 6a The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6b The astigmatism curve of the optical imaging lens of Example 3 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 6c The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6d The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 6a to 6d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0127] Figure 7 Schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0128] The first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative focal power, its object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive focal power, its object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive focal power, its object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative focal power, its object side surface S9 is concave, and the image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0129] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0130] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2080 S1 Aspheric 0.9567 0.4430 2.79 1.50 81.5 -0.0074 S2 Aspheric 2.6031 0.2116 12.3860 S3 Aspheric -4.7362 0.2100 -11.93 1.68 19.24 19.1063 S4 Aspheric -11.6443 0.1577 -62.1935 S5 Aspheric 4.0287 0.2400 60.00 1.67 20.37 23.0663 S6 Aspheric 4.3728 0.4225 11.0720 S7 Aspheric 52.1711 0.5104 1.83 1.55 56.11 -98.0000 S8 Aspheric -1.0142 0.3042 -0.8325 S9 Aspheric -0.5807 0.3380 -1.37 1.54 55.65 -0.9996 S10 Aspheric -3.2938 0.2489 -0.7060 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1537 S13 Spherical endless endless

[0131] Table 10

[0132] As shown in Table 11, in Example 4, the total effective focal length f of the optical imaging lens is 2.97 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis is 3.45 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=3.01 mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 44.78°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0133]

[0134] Table 11

[0135] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 12 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 4. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0136]

[0137]

[0138] Table 12

[0139] Figure 8a The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8b The astigmatism curve of the optical imaging lens of Example 4 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 8c The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8d The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8a to 8d It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0141] Fig. 9 Schematic diagram of the lens group structure of embodiment 5 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0142] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0143] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0144] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2112 S1 Aspheric 0.9712 0.4436 2.83 1.50 81.5 -0.0196 S2 Aspheric 2.6509 0.2079 12.8195 S3 Aspheric -11.0920 0.2100 -11.65 1.68 19.24 56.4653 S4 Aspheric 27.6238 0.1842 -94.7956 S5 Aspheric 4.3822 0.2428 -242.12 1.67 20.37 23.3807 S6 Aspheric 4.1719 0.3950 11.4927 S7 Aspheric 23.7326 0.5280 1.83 1.55 56.11 -89.6234 S8 Aspheric -1.0348 0.3287 -0.8264 S9 Aspheric -0.5898 0.3380 -1.42 1.54 55.65 -0.9995 S10 Aspheric -3.1418 0.2537 -1.0730 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1581 S13 Spherical endless endless

[0145] Table 13

[0146] As shown in Table 14, in Example 5, the total effective focal length f of the optical imaging lens is 3.02 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis is 3.50 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=2.92 mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 43.47°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0147]

[0148] Table 14

[0149] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 15 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 5. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0150]

[0151]

[0152] Table 15

[0153] Fig.10a The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.10b The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.10c The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.10d The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10a to 10d It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0155] Fig.11Schematic diagram of the lens group structure of embodiment 6 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0156] The first lens E1 has positive focal power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative focal power, its object side surface S3 is concave, and the image side surface S4 is concave. The third lens E3 has positive focal power, its object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive focal power, its object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative focal power, its object side surface S9 is concave, and the image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0157] As shown in Table 16, it is a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0158] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2091 S1 Aspheric 0.9753 0.4429 2.83 1.50 81.5 -0.0166 S2 Aspheric 2.6882 0.2079 12.8759 S3 Aspheric -8.7671 0.2101 -10.32 1.68 19.24 62.6604 S4 Aspheric 34.9017 0.1845 -98.0000 S5 Aspheric 4.0021 0.2410 70.00 1.67 20.37 22.6707 S6 Aspheric 4.2718 0.3987 11.3529 S7 Aspheric 24.1212 0.5250 1.83 1.55 56.11 -69.3692 S8 Aspheric -1.0345 0.3235 -0.8280 S9 Aspheric -0.5873 0.3397 -1.41 1.54 55.65 -1.0001 S10 Aspheric -3.1379 0.2560 -1.0862 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1607 S13 Spherical endless endless

[0159] Table 16

[0160] As shown in Table 17, in Example 6, the total effective focal length f of the optical imaging lens is 3.01 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis is 3.50 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=2.95 mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 43.76°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0161]

[0162] Table 17

[0163] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 18 shows the high-order coefficients A of the aspherical mirror surfaces S1-S10 that can be used in Example 6. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22, A 24 , A 26 , A 28 and A 30 .

[0164]

[0165]

[0166] Table 18

[0167] Fig.12a The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12c The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical imaging lens provided in Example 6 can achieve good imaging quality. Specific embodiment 7

[0169] Fig.13 Schematic diagram of the lens group structure of embodiment 7 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0170] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0171] As shown in Table 19, it is a basic parameter table of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0172] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless STO Spherical endless -0.2150 S1 Aspheric 0.9631 0.4485 2.78 1.50 81.5 -0.0137 S2 Aspheric 2.6810 0.2309 13.1939 S3 Aspheric -4.3521 0.2100 -11.86 1.68 19.24 20.2407 S4 Aspheric -9.6767 0.1501 41.7680 S5 Aspheric 4.5062 0.2400 70.00 1.67 20.37 22.4768 S6 Aspheric 4.8812 0.4278 13.8975 S7 Aspheric -70.0000 0.5314 1.81 1.55 56.11 -98.0000 S8 Aspheric -0.9762 0.2967 -0.8294 S9 Aspheric -0.5812 0.3380 -1.36 1.54 55.65 -0.9993 S10 Aspheric -3.4035 0.2566 -0.5945 S11 Spherical endless 0.2100 1.52 64.17 S12 Spherical endless 0.1600 S13 Spherical endless endless

[0173] Table 19

[0174] As shown in Table 20, in Example 7, the total effective focal length of the optical imaging lens f=3.02 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 on the optical axis=3.50 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 ImgH=3.01 mm, and half of the maximum field angle of the optical imaging lens Semi-FOV=44.27°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0175]

[0176] Table 20

[0177] In Example 7, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 21 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S10 that can be used in Example 7. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0178]

[0179]

[0180] Table 21

[0181] Fig.14a The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.14b The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14c The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.14d The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 14a to 14d It can be seen from the figure that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0182] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, It is characterized in that The optical imaging lens has five lenses with optical power, and the five lenses include, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, and its object side surface is convex and its image side surface is concave; The second lens has a concave object side surface; The third lens has a convex object side surface and a concave image side surface; a fourth lens element having positive refractive power and a convex image-side surface; A fifth lens having negative optical power, whose object side surface is concave and image side surface is convex; The second lens has negative optical power and the third lens has negative optical power, or the second lens has positive optical power and the third lens has negative optical power, or the second lens has negative optical power and the third lens has positive optical power; There is air space between each adjacent lens; Contains a glass aspheric surface; The effective focal length f5 of the fifth lens, the curvature radius R9 of the object side surface of the fifth lens, and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.34≤f5 / (R9+R10)≤0.53; The on-axis distance T12 from the first lens to the second lens and the on-axis distance T34 from the third lens to the fourth lens satisfy: 0.52≤T12 / T34≤0.71; The effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f4 of the fourth lens satisfy: 1.63≤f / f1+f / f4≤1.

82.

2. The optical imaging lens according to claim 1, Features: The axial distance TTL from the object side surface of the first lens to the imaging surface and half the diagonal length ImgH of the effective pixel area of ​​the electronic photosensitive element satisfy the following: 1.15≤TTL / ImgH≤1.

2.

3. The optical imaging lens according to claim 1, Features: A curvature radius R1 of the object side surface of the first lens and a curvature radius R2 of the image side surface of the first lens satisfy: 0.36≤R1 / R2≤0.

4.

4. The optical imaging lens according to claim 1, Features: The effective focal length f of the optical imaging lens and the curvature radius R6 of the image side surface of the third lens satisfy: 0.62≤f / R6≤1.

5. The optical imaging lens according to claim 1, Features: A center thickness CT5 of the fifth lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.57≤CT5 / CT4≤0.

66.

6. The optical imaging lens according to claim 1, Features: The on-axis distance T23 from the second lens to the third lens, the on-axis distance T45 from the fourth lens to the fifth lens, and the center thickness CT1 of the first lens on the optical axis satisfy: 1≤(T23+T45) / CT1≤1.

21.

7. The optical imaging lens according to claim 1, Features: The effective half-aperture DT21 of the object side of the second lens and the effective half-aperture DT12 of the image side of the first lens satisfy the following: 1.01≤DT21 / DT12≤1.

03.

8. The optical imaging lens according to claim 1, Features: The effective half-aperture DT22 of the image side surface of the second lens and the effective half-aperture DT31 of the object side surface of the third lens satisfy: 0.83≤DT22 / DT31≤0.

87.

9. The optical imaging lens according to claim 1, Features: The sum ∑AT of the air intervals on the optical axis between any two adjacent lenses with optical focal length from the first lens to the lens closest to the imaging surface and the maximum field of view FOV of the optical imaging lens satisfy the following conditions: 1.04mm≤∑AT / tan(FOV / 2)≤1.18mm.

10. The optical imaging lens according to claim 1, Features: The on-axis distance SAG21 between the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens and the effective half aperture DT32 of the image side surface of the third lens satisfy: 0.22≤SAG21 / DT32≤0.

54.

11. The optical imaging lens according to claim 1, Features: The on-axis distance SAG41 between the intersection of the fourth lens object side and the optical axis to the effective radius vertex of the fourth lens object side and the on-axis distance SAG42 between the intersection of the fourth lens image side and the optical axis to the effective radius vertex of the fourth lens image side satisfy: 0.38≤SAG41 / SAG42≤0.47.

Images